I have (knock on wood) never accidentally gybed in my boat, but I've done it a couple times in a cape cod mercury... that experience has made me very vigilant about not doing it on my boat! I keep an eye glued to the windex. The trick about watching for the collapsing genoa is also a good one... I realized when I read it that I was watching that without even knowing I was doing it. I sail wing-and-wing, just about every time I've gone out, since usually the wind is light and directly down the Charles. This necessitates sailing by-the-lee, which I find even more nerve wracking...
1979 Gulfstar 37 Laissez Faire